CN112899908A - Overedger with three-light-eye automatic detection device and sewing method - Google Patents
Overedger with three-light-eye automatic detection device and sewing method Download PDFInfo
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- CN112899908A CN112899908A CN202110054833.6A CN202110054833A CN112899908A CN 112899908 A CN112899908 A CN 112899908A CN 202110054833 A CN202110054833 A CN 202110054833A CN 112899908 A CN112899908 A CN 112899908A
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B69/00—Driving-gear; Control devices
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/02—Presser-control devices
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B37/00—Devices incorporated in sewing machines for slitting, grooving, or cutting
- D05B37/04—Cutting devices
Abstract
The invention belongs to the technical field of sewing equipment, and particularly relates to an overlock machine with a three-light-eye automatic detection device and a sewing method, wherein the overlock machine comprises a first light eye, a second light eye, a third light eye and a fourth light eye, wherein the first light eye is arranged at the rear end of a sewing table, is used for detecting the position of cloth and sending a signal to lift a presser foot; the second optical eye is arranged at the front end of the first optical eye, detects the position of the cloth, sends a signal to enable the cutter to rotate, and cuts the front end of the cloth; the second optical eye is provided with a plurality of adjusting optical eyes which can be switched to use and are arranged at intervals along the cloth feeding direction; the third optical eye is arranged at the front end of the second optical eye, detects the position of the cloth, sends a signal to enable the cutter to rotate, and cuts the rear end of the cloth; the light source is arranged on the handpiece and comprises three independent emitters which respectively irradiate the first photo eye, the second photo eye and the third photo eye. The positions of the first light eye and the second light eye are changed by selecting different adjusting light eyes, and different needle pitches of the overedger are finally matched, so that the cutter can cut the cloth with different needle pitches.
Description
Technical Field
The invention relates to the technical field of sewing equipment, in particular to an overlock sewing machine with a three-light-eye automatic detection device and a sewing method.
Background
With the rising of labor cost, garment manufacturing enterprises need to adopt an automatic overedger to reduce the manual use amount in order to save cost, so that the automatic computer-controlled overedger gradually replaces a common overedger, an important ring of the automatic overedger serving as an automatic precondition automatic detection device is also provided, the current two-eye automatic detection device cannot accurately judge the position of a cut thread, and unnecessary loss and trouble are caused due to the fact that a knife cuts cloth or the residual thread end is too long, and therefore, the addition of a third eye automatic detection device on the overedger is necessary. The first photo eye detects a starting position signal of the overedger, the second photo eye detects a front trimming and stopping position signal of the overedger, the third photo eye detects a rear trimming position signal of the overedger, and the three photo eyes are matched to enable people to better sense an operation state and be used for controlling the overedger, so that the automation control degree is increased.
The china application patent number is 201520556759.8, and the publication date is 2015 12 months 16 days, and the utility model discloses a three light eyes automatic checkout device for industrial overedger, the three light eyes automatic checkout device for industrial overedger that this application discloses has compact structure, the appearance is pleasing to the eye, convenient assembling, do not influence workman's operation, the production technology is good, energy-conservation nature advantage such as good. The defect is that the position of the light eye can not be adjusted, only the cloth with uniform needle pitch can be detected, and the detection of the needle pitch required by different cloths in industrial production during processing can not be met.
Disclosure of Invention
The invention aims to provide an overlock sewing machine with a three-eyelet automatic detection device and a sewing method.
The purpose of the invention is realized as follows:
a three-eye automatic detection device for an overlock machine comprises:
the machine head is used for overlocking cloth;
the sewing platform is arranged at one end of the machine head and is used as a processing platform of cloth;
the presser foot is arranged on the machine head in a vertically moving mode and is used for pressing the cloth on the sewing table;
the cutter is rotationally arranged on the machine head and is used for cutting the cloth on the sewing table;
further comprising:
the first photo eye is arranged at the rear end of the sewing table and used for detecting the position of the cloth and sending a signal to lift the presser foot;
the second optical eye is arranged at the front end of the first optical eye and used for detecting the position of the cloth and sending a signal to enable the cutter to rotate so as to cut the front end of the cloth;
the second eyelet is provided with a plurality of adjustable eyelets which can be switched for use and are arranged at intervals along the cloth feeding direction, and the plurality of adjustable eyelets are used for matching with different needle pitches of the overedger so that the cutter can cut the cloth under different needle pitches;
the third optical eye is arranged at the front end of the second optical eye and used for detecting the position of the cloth, and simultaneously sending a signal to enable the cutter to rotate and cut the rear end of the cloth;
the light source is arranged on the machine head; the light source comprises three independent emitters which respectively irradiate the first photo eye, the second photo eye and the third photo eye.
Preferably, photoelectric switches are arranged below the first photo eye, the second photo eye and the third photo eye, the photoelectric switches are turned on and off by blocking the photo eyes through cloth, and the photoelectric switches are used for transmitting signals, so that the overedger can perform corresponding operations according to the signals.
A sewing method of an overlock machine based on three smooth eyes is applied to the overlock machine with the automatic detection device of the smooth eyes, and is characterized by comprising the following steps:
step S1: a user inputs corresponding data to a control system of the overedger according to the cloth needing to be sewn currently;
step S2: a user feeds the cloth into the sewing table, the cloth advances to cover the first photo eye, the first photo eye is triggered and sends a control signal to the control system, and the control system controls the presser foot to automatically ascend;
step S3: after the cloth is fed below the presser foot, the control system controls the presser foot to descend to press the cloth and execute sewing operation;
step S4: the cloth advances, a second light eye is shielded, the second light eye is triggered and sends a control signal to the control system, the thread cutting action is executed according to the needle number delay function set by the control system, and the length of the thread end at the front end of the cloth is cut;
step S5: the cloth advances, the third light eye is shielded, the third light eye is triggered and sends a control signal to the control system, the thread cutting action is executed according to the needle number delay function set by the control system, and the length of the thread end at the rear end of the cloth is cut;
step S6: after sewing, the control system controls the presser foot to automatically ascend to wait for the next workpiece.
Preferably, the second optical eye comprises more than one adjusting optical eye, and the control system controls one or more adjusting optical eyes to keep working and is in an opening state.
Preferably, the control system includes a full-automatic mode and a semi-automatic mode, when the control system is in the full-automatic mode and the semi-automatic mode, in step S3, after the control system receives the signal of the first photo eye, the control system delays a set time to control the presser foot to descend, and starts the motor to sew; when the control system does not receive the signal of the first photo eye, the pressure foot and the motor are locked to avoid being started.
Preferably, the control system further comprises a semi-free seam mode and a pure manual mode, when the control system is in the free seam mode and the pure manual mode, in step S3, the foot control device sends a starting signal to the control system, and the control system starts the motor to perform sewing; the control system detects the state of the presser foot before starting the motor, controls the presser foot to descend firstly when the presser foot is lifted up, and then starts the motor.
Preferably, the user can set the movement period of the cutter through the control system, after the cloth advances to cover the second light eye, the cutter falls down again after the delay time or the delay starting needle number set by the system, and the thread end at the rear end of the cloth is cut.
Preferably, the control system of the overedger can selectively open the corresponding adjusting eye in the second eye according to data.
Preferably, when all the first photo eye, the second photo eye and the third photo eye are covered, the control system sends corresponding signals to keep the cutter still.
Compared with the prior art, the invention has the outstanding and beneficial technical effects that:
1. according to the invention, the positions of the first light eye and the second light eye are changed by selecting different adjusting light eyes, so that the position of the cloth when the second light eye is covered is changed, and the cloth is finally matched with different needle pitches of the overedger, so that the cloth under different needle pitches can be cut by the cutter.
2. The invention keeps the photoelectric switches below the three parts on or off through the stable light source, so that the light intensity can be obviously changed when the cloth shields the three parts, thereby changing the state of the photoelectric switches and finally successfully sending signals. The light in the working environment is prevented from being too weak, and the use of the photo eyes is prevented from being influenced.
3. When the first photo eye, the second photo eye and the third photo eye are all blocked, the control system can send signals to enable the cutter to keep static, so that the situation that the control system continues to send signals to enable the cutter to rotate according to the signal instruction that the second photo eye is blocked to cut the previous section of cloth instead of cutting the thread end, and further product scrapping is caused is avoided. Finally, the safety of the machine is improved, and the yield of the machine is improved.
4. In the invention, only one of the plurality of adjusting optical eyes in the second optical eye is kept to work and is in an open state, so that the use of the overedger is prevented from being influenced by the mutual interference of different adjusting optical eyes.
5. In the invention, when the third optical eye is damaged or closed, a user can still set the motion period of the cutter through the control system according to the advancing speed of the cloth. After the second light eye is covered, the cutter falls down again after the time set by the system, and the thread end at the rear end of the cloth advances to the lower part of the cutter according to the set speed, so that the cutter can cut the rear end of the cloth more accurately.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a flow chart of the method of the present invention.
Reference numerals: 1-machine head; 2-sewing the table; 3-presser foot; 4-cutting tool; 5-a first photo eye; 6-second photo eye; 7-third photo eye; 8-adjusting the optical eye; 9-light source.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
An overlock sewing machine with a three-eye automatic detection device is shown in figure 1 and comprises a machine head 1 which is used for conveying and overlock sewing cloth. One end of the machine head 1 is provided with a sewing platform 2, and the sewing platform 2 is used as a processing platform of cloth, so that the machine head 1 can process the cloth. The machine head 1 is also provided with a presser foot 3 capable of moving up and down, and the presser foot 3 is used for pressing the cloth, so that the machine head 1 can conveniently perform overedgement on the cloth. The machine head 1 is also rotatably provided with a cutter 4, and the cutter 4 is positioned on the front side of the presser foot 3, so that cloth fed after the machine head 1 is sewn in a covering mode can be conveniently cut. The driving source or the power source of each part of the automatic three-optical-eye detection device during movement is arranged in the overedger, so that the occupied space of the automatic three-optical-eye detection device is saved.
The sewing table 2 is further provided with three optical eyes, the first optical eye 5 is arranged at the rear end of the sewing table 2, the second optical eye 6 is arranged on the front side of the optical eye, and the third optical eye 7 is arranged on the front side of the second optical eye 6, so that the position of the cloth is detected through the three optical eyes, and corresponding signals are sent to a control system of the overedger to enable the overedger to perform corresponding operations.
The cloth enters the sewing platform 2 and when moving forwards, the first eyelet 5 is firstly shielded, the first eyelet 5 sends a signal to a control system of the overedger, the control system controls the lifting of the presser foot 3, and the machine head 1 drives the cloth to move forwards and fall below the presser foot 3. Then the presser foot 3 is pressed down, the machine head 1 starts to carry out the overedging operation on the cloth, and the machine head 1 keeps on the cloth feeding operation.
When the cloth advances to cover the second eyelet 6, the thread end at the front end of the cloth is positioned below the cutter 4, the second eyelet 6 sends a signal to a control system of the overedger, and the control system controls the cutter 4 to rotate, so that the thread end at the front end of the cloth is accurately cut. After the cutting is finished, the cloth continues to advance to cover the third photo-eye 7, so that the third photo-eye 7 sends a corresponding signal to the control system, and after the time set by the system, the thread end at the rear end of the cloth falls below the cutter 4, and then the thread end at the rear end of the cloth can be accurately cut.
And finally, the machine head 1 sends the processed cloth out of the overedger.
Meanwhile, the machine head 1 is also provided with an air suction device, when the cloth feeding is started, the control system sends a starting signal to the air suction device and stops after the needle number is set;
after the front trimming of the trimming device, namely the cutter cuts the length of the thread end at the front end of the cloth, the control system intermittently sends a starting signal to the air suction device, the air suction device intermittently sucks air for dust collection, and meanwhile, a user can autonomously control the opening and closing of the air suction device at the moment through the control system;
and when the third photo eye is changed from the shielding state to the non-shielding state, the control system sends a starting signal to the air suction device, and the third photo eye is closed after the time delay is set.
The second eyelet 6 is provided with a plurality of adjusting eyelets 8 which are arranged in front and back, so that the positions of the second eyelet 6 and the first eyelet 5 are changed by selecting different adjusting eyelets 8, and the position of the cloth is finally matched with different needle pitches of the overedger when the second eyelet 6 is covered, so that the cloth 4 can cut the cloth under different needle pitches.
The lower parts of the first photo eye 5, the second photo eye 6 and the third photo eye 7 are provided with photoelectric switches which receive light sources and conduct or break circuits according to the intensity of the light sources, so that the intensity of light irradiating on the photoelectric switches is changed through the shielding of cloth on the photo eyes, the on and off of the photoelectric switches are realized, corresponding signals are transmitted through the photoelectric switches, and the overedger is enabled to perform corresponding operations according to the signals.
Simultaneously, in order to prevent that light is too weak among the operational environment, influence the use of photo eye, still have light source 9 on the aircraft nose 1, first photo eye 5, second photo eye 6 and third photo eye 7 three's position homoenergetic are shone by light source 9 to make the photoelectric switch of three below keep opening or closing through this stable light source 9, and then the light intensity homoenergetic has obvious change when making the cloth shelter from the three, thereby change photoelectric switch's state, finally successfully send the signal.
The sewing method applied to the sewing machine having the automatic three-eyed detection device will be specifically described next. As shown in fig. 2, the method comprises the steps of:
step S1: a user inputs corresponding data such as a needle pitch, a cloth width, a cloth length, a thread end length, a motion period of a cutter 4 or a cycle period of rising and falling of a presser foot 3 and the like into a control system of the overedger according to the cloth needing to be sewn currently;
step S2: a user feeds the cloth into the sewing table 2, the machine head 1 drives the cloth to move forward, then the first photo eye 5 is shielded, the first photo eye 5 is triggered and sends a control signal to the control system, and the control system controls the presser foot 3 to automatically ascend, so that the cloth can conveniently move forward;
step S3: after the cloth is fed below the presser foot 3 and the time set by the control system is up, the presser foot 3 descends to press the cloth, and the machine head 1 synchronously carries out cloth feeding and overlock operation;
step S4: when the cloth finishes the overedging operation and moves forward to cover the second eyelet 6, the second eyelet 6 is triggered and sends a control signal to the control system, after the time set by the system, the control system controls the cutter 4 to rotate again, the thread cutting action is executed according to the needle number delay function set by the control system, and the length of the thread end at the front end of the cloth is cut;
step S5: the third eyelet 7 is covered when the cloth advances, the third eyelet 7 is triggered and sends a control signal to the control system, the thread cutting action is executed according to the needle number delay function set by the control system, the cutter 4 rotates, and the length of the thread end at the rear end of the cloth is cut;
step S6: after sewing, the control system controls the presser foot (3) to automatically ascend to wait for the next workpiece. The control system of the overedger can select to open the corresponding adjusting optical eye 8 in the second optical eye 6 according to data, and the adjusting optical eye 8 is the second optical eye 6 at the moment, so that the positions of the first optical eye 5, the second optical eye 6 and the third optical eye 7 are determined, and the overedger adapts to the data of the cloth to be processed;
meanwhile, when the current section of cloth is not sent out of the overedger and is still at the position of the third eyelet 7, the next section of cloth is sent to the positions of the first eyelet 5 and the second eyelet 6 of the overedger, namely when the first eyelet 5, the second eyelet 6 and the third eyelet 7 are all covered, the control system can send a signal to keep the cutter 4 static, so that the control system is prevented from continuing to send a signal to enable the cutter 4 to rotate according to a signal instruction that the second eyelet 6 is blocked, the previous section of cloth is cut and damaged instead of cutting a thread end, and further scrapping of a product is caused. Finally, the safety of the machine is improved, and the yield of the machine is improved.
More than one adjusting optical eye 8 in the second optical eye 6, and the control system controls only one adjusting optical eye 8 to keep working and is in an opening state, so that the different adjusting optical eyes 8 are prevented from interfering with each other and influencing the use of the overedger.
The control system includes an automatic mode, a semi-free stitch mode, and a purely manual mode.
When the control system is in a full-automatic mode or a semi-automatic mode, in the step S3, after the control system receives the signal of the first photo eye 5, the control system delays the set time to control the presser foot 3 to descend, and starts the motor to sew; when the control system does not receive the signal of the first photo eye 5, the presser foot 3 and the motor are locked to avoid being started.
When the control system is in the free sewing and pure manual mode, in step S3, the foot control device sends a start signal to the control system, and the control system starts the motor to perform sewing; the control system detects the state of the presser foot 3 before starting the motor, controls the presser foot 3 to descend firstly when the presser foot is lifted up, and then starts the motor.
When the third photo eye 7 is damaged or closed, the user can set the movement period of the cutter 4 through the control system according to the advancing speed of the cloth. After the second eyelet 6 is covered, the cutter 4 falls down again after the delay time or the delay starting needle number set by the system, and the thread end at the rear end of the cloth advances to the lower part of the cutter 4 according to the set speed, so that the cutter 4 cuts the rear end of the cloth accurately.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. An overlock sewing machine with automatic photo eye detection device, comprising:
the machine head (1) is used for conveying and overedging cloth;
the sewing platform (2) is arranged at one end of the machine head (1) and is used as a processing platform of cloth;
a presser foot (3) which can move up and down and is arranged on the machine head (1) and is used for pressing the cloth on the sewing platform (2);
the cutter (4) is rotatably arranged on the machine head (1), is positioned on the front side of the presser foot (3) and is used for trimming threads;
it is characterized by also comprising:
the first photo eye (5) is arranged at the front end of the sewing table (2) and used for detecting the position of the cloth and sending a signal to lift the presser foot (3);
the second optical eye (6) is arranged at the rear side of the first optical eye (5) and used for detecting the position of the cloth, sending a signal to enable the cutter (4) to rotate and cutting the thread end at the front end of the cloth; the second light eye (6) is provided with a plurality of adjustable light eyes (8) which can be switched to use and are arranged at intervals along the cloth feeding direction, and the plurality of adjustable light eyes (8) are used for matching with different needle pitches of the overedger so that the cutter (4) can cut cloth with different needle pitches;
the third optical eye (7) is arranged at the rear side of the second optical eye (6) and close to the front side of the cutting edge, is used for detecting the position of the cloth, and simultaneously sends a signal to enable the cutter (4) to rotate so as to cut the thread end at the rear end of the cloth;
a light source (9) arranged on the handpiece (1); the light source comprises three independent emitters which respectively irradiate the first photo eye (5), the second photo eye (6) and the third photo eye (7).
2. The overedger with automatic photo eye detection device according to claim 1, characterized in that: the first photo eye (5), the second photo eye (6) and the third photo eye (7) are provided with a plurality of photoelectric switches which receive light sources and conduct or break circuits according to the intensity of the light sources; the strength of the induction value received by the photo eye is switched by the shielding of the cloth on the photo eye, and the photo eye transmits a signal to a sewing machine control system to perform corresponding operation.
3. A sewing method of an overlock machine based on three eyes, applied to the overlock machine with automatic eye detection device as claimed in claim 1 or 2, characterized by comprising the following steps:
step S1: a user inputs corresponding data to a control system of the overedger according to the cloth needing to be sewn currently;
step S2: a user feeds the cloth into the sewing table (2), the cloth advances to cover the first photo eye (5), the first photo eye (5) is triggered and sends a control signal to the control system, and the control system controls the presser foot (3) to automatically ascend;
step S3: after the cloth is fed below the presser foot (3), the control system controls the presser foot (3) to descend to press the cloth and execute sewing operation;
step S4: the cloth advances, the second photo eye (6) is shielded, the second photo eye (6) is triggered and sends a control signal to the control system, the thread cutting action is executed according to the needle number delay function set by the control system, and the length of the thread end at the front end of the cloth is cut;
step S5: the cloth advances, the third light eye (7) is shielded, the third light eye (7) is triggered and sends a control signal to the control system, the thread cutting action is executed according to the needle number delay function set by the control system, and the length of the thread end at the rear end of the cloth is cut;
step S6: after sewing, the control system controls the presser foot (3) to automatically ascend to wait for the next workpiece.
4. The sewing method of the overlock sewing machine based on the three-plain-eye according to claim 3, characterized in that: the second optical eye (6) comprises more than one adjusting optical eye (8), and the control system controls one and only one adjusting optical eye (8) to keep working and is in an opening state.
5. The sewing method of the overlock sewing machine based on the three-plain-eye according to claim 4, characterized in that: the control system comprises a full-automatic mode and a semi-automatic mode, when the control system is in the full-automatic mode and the semi-automatic mode, in the step S3, after the control system receives a signal of the first photo eye (5), the control system delays the set time to control the presser foot (3) to descend, and starts the motor to sew; when the control system does not receive the signal of the first photo eye (5), the presser foot (3) and the motor are locked to avoid being started.
6. The sewing method of the three-eyelet-based overedger according to claim 5, wherein: the control system further comprises a semi-free seam mode and a pure manual mode, when the control system is in the free seam mode and the pure manual mode, in the step S3, a starting signal is sent to the control system through the foot control device, and the control system starts the motor to sew; the control system detects the state of the presser foot (3) before starting the motor, controls the presser foot (3) to descend when the presser foot is lifted up, and then starts the motor.
7. The sewing method of the overlock sewing machine based on the three-plain-eye according to claim 3, characterized in that: the user can set the motion cycle of the cutter (4) through the control system, after the cloth advances to cover the second light eye (6), the cutter (4) falls down again after the delay time or the delay starting needle number set by the system, and the thread end at the rear end of the cloth is cut.
8. The sewing method of the overlock sewing machine based on the three-plain-eye according to claim 3, characterized in that: and the control system of the overedger can selectively open the corresponding adjusting light eye (8) in the second light eye (6) according to data.
9. The sewing method of the overlock sewing machine based on the three-plain-eye according to claim 3, characterized in that: when the cloth feeding starts, the control system sends a starting signal to the air suction device and stops after the needle number is set;
after the front trimming of the trimming device, the control system intermittently sends a starting signal to the air suction device;
and when the third photo eye is changed from the shielding state to the non-shielding state, the control system sends a starting signal to the air suction device, and the third photo eye is closed after the time delay is set.
10. The sewing method of the overlock sewing machine based on the three-plain-eye according to claim 3, characterized in that: and when the first photo eye, the second photo eye and the third photo eye are all covered, the control system sends corresponding signals to keep the cutter (4) static.
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| CN202110054833.6A CN112899908A (en) | 2021-01-15 | 2021-01-15 | Overedger with three-light-eye automatic detection device and sewing method |
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| CN202110054833.6A CN112899908A (en) | 2021-01-15 | 2021-01-15 | Overedger with three-light-eye automatic detection device and sewing method |
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| JP2010081982A (en) * | 2008-09-29 | 2010-04-15 | Juki Corp | Sewing machine |
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Application publication date: 20210604 |